Abstract
We report on the synthesis and structural and magnetic properties of the new SrLa2FeCuSbO9 perovskite. The compound was prepared by the solid-state reaction method. The crystalline structure was studied by X-ray diffraction experiments using the Rietveld refinement analysis. SrLa2FeCuSbO9 crystallizes in a monoclinic system (P21/n space group). Its unit cell parameters are a = 5.6101(2) A, b = 5.6125(2) A, c = 7.9358(3) A, and β = 90.094(2)°. Sr2+ and La3+, in SrLa2FeCuSbO9, are statistically distributed within the A-perovskite sites. The obtained cationic distribution can be illustrated by the [SrLa2]A[(SbCu0.5)2c(FeCu0.5)2d]BO9 crystallographic formula. SrLa2FeCuSbO9 was found to exhibit a paramagnetic–ferrimagnetic transition around TC = 215 K. At high temperature, the magnetic susceptibility was described by the Curie–Weiss law. The experimental effective moments were explained by only spin contribution for Cu2+ and Fe3+ ions. At low temperature, the compound presents a ferrimagnetic state with signs of frustration.
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